#1145: class instance lost during re-export & packaging
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Reporter: conal | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.6.1
Component: Compiler (Type checker) | Version: 6.6
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Comment (by conal):
My goof. The import should be just "Interface.TV" (without ".UI"). The
new TV (version 2.0) only depends on the base, mtl & !DeepArrow packages
(no longer Phooey, which needs wxHaskell), so I guess you'd just need to
install [http://haskell.org/haskellwiki/DeepArrow DeepArrow], which is
small & easy. (The "UI" module is now
[http://haskell.org/haskellwiki/GuiTV GuiTV] and re-exports
"Interface.TV".)
The corrected Bug.hs:
{{{
module Bug where
import Interface.TV
-- Required to pick up the FunArr instance for OFun. GHC bug?
import Interface.TV.OFun()
reverseT :: TV KIO (String -> String)
reverseT = tv (oTitle "reverse" defaultOut) reverse
revTwice :: TV KIO (String -> String)
revTwice = reverseT ->| reverseT
}}}
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1145>
GHC <http://www.haskell.org/ghc/>
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